The main use case for the database is BTC (transactions). Exclusive usage in the case of Bitcoin.
Ethereum is a way more useful network than Bitcoin (as a database and a network), for example, yet isn't as strong (in terms of computing power). MCap wise neither.
More networks to come will be more optimized and allow more and more use cases as DB/Network.
But BTC is a symbol, and has the stronger network so far (computational power)
Ethereum tries to be a currency and a "world computer" at the same time - this is not going to work, the "world computer" part will compromise the currency, and the currency will be holding back the "world computer". Ethereum is only getting more and more centralized because of their bloated blockchain, centralized development and now PoS consensus. And the new coins like TRON are borderline scams, because all they do is make loud statements without achieving anything.